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Analog Devices Inc. LTC2900-1IMS#TRPBF
- Part No.:
- LTC2900-1IMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2900-1IMS#TRPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,472
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Product details
Overview
LTC2900-1IMS#TRPBF from Analog Devices (acquired Linear Technology) is a programmable quad supply monitor IC with open-drain RST output, simultaneously monitoring up to four independent voltage rails (e.g., 5V, 3.3V, 2.5V, 1.8V), ±1.5% threshold accuracy over temperature, 43µA typical supply current, and adjustable reset timeout via external capacitor. It serves as a system-level power supervisor in multivoltage embedded systems requiring reliable brownout and power-up reset assertion.
For engineers reviewing the LTC2900-1IMS#TRPBF datasheet, LTC2900-1IMS#TRPBF pinout, LTC2900-1IMS#TRPBF application, or LTC2900-1IMS#TRPBF equivalent, this page delivers verified specifications, package mapping, real-world use scenarios, and validated alternative options - all grounded in the official Linear Technology LTC2900 datasheet Rev. F and Analog Devices product documentation.
Technical Context
The LTC2900-1IMS#TRPBF implements four independent high-accuracy comparators with user-programmable thresholds selected via a single VPG pin connected to a precision resistor divider referencing VREF (1.210V). Its internal architecture includes glitch-immune detection logic, a programmable reset timer driven by CRT pin capacitance, and guaranteed RST assertion down to VCC = 1V.
It features a manual reset input (PBR) with internal pull-up and debounced propagation, open-drain RST output with weak internal pull-up to V2 (6µA typ), and supports both positive adjustable (ADJ) and negative adjustable (–ADJ) monitoring modes for V3/V4 inputs - enabling precise trip-point configuration for custom or bipolar supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Monitoring Channels | 4 independent inputs (V1–V4), configurable across 16 preset/adjustable combinations including 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V, ADJ, –ADJ |
| Threshold Accuracy | ±1.5% of monitored voltage over full operating temperature range (–40°C to +85°C) |
| Quiescent Supply Current | 43µA typical - enables use in battery-powered and low-power always-on systems |
| RST Output Type | Open-drain with weak internal pull-up to V2 (6µA typ); requires external pull-up for VOH > V2 or faster rise time |
| Reset Timeout Range | Adjustable from ~50µs (CRT open) to seconds (CRT = 1µF); calibrated at 4.6ms/nF (e.g., 47nF → 216ms) |
| Minimum Operating VCC | 1V - ensures valid RST state during deep brownout; internal circuitry remains functional down to this rail |
| VREF Output | 1.210V ±0.018V buffered reference, capable of sourcing/sinking ±1mA for programming and external divider bias |
Pinout & Package
Package: 10-lead MSOP (3mm × 3mm), RoHS-compliant, moisture-sensitive level 1. Pin 1 marked with dot; exposed pad not electrically connected (thermal relief only).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1 | Input 1 | Monitors primary supply (5V or 3.3V); greater of V1/V2 sets internal VCC; bypass with ≥0.1µF to GND |
| V2 | Input 2 | Monitors secondary supply (3.3V, 3V, or 2.5V); greater of V1/V2 sets VCC; RST weakly pulled up to this rail |
| CRT | Reset Timer Capacitor | Connects external capacitor to GND to set reset timeout (4.6ms/nF); open = ~50µs min delay |
| RST | Reset Output | Active-low open-drain output; sinks >2.5mA; pulled up internally to V2 (6µA); external pull-up required for logic-high drive |
| PBR | Manual Reset Input | Active-low push-button interface; internal 10µA pull-up; debounced via CRT timing; VIH = 1.6V, VIL = 0.4V |
| GND | Ground Reference | Analog/digital common return; must be low-impedance connection for accurate threshold sensing |
| VPG | Programming Voltage Input | Accepts ratiometric divider (VREF–GND) to select 1 of 16 voltage combinations; no capacitance allowed |
| VREF | Buffered Reference | 1.210V ±0.018V output; drives VPG divider and external circuits; stable with ≤1000pF load |
| V4 | Input 4 | Monitors tertiary supply (1.8V, 1.5V, ADJ, or –ADJ); supports negative rail sensing via external resistive level shift |
| V3 | Input 3 | Monitors quaternary supply (2.5V, 1.8V, 1.5V, or ADJ); shares ADJ/–ADJ capability with V4; high-impedance input |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Quad Threshold Selection | Single-pin (VPG) resistor-divider programming enables 16 distinct 4-rail configurations without firmware or external logic |
| Guaranteed Operation Down to 1V VCC | Ensures robust reset assertion during severe brownout - critical for non-volatile memory write protection and processor safe shutdown |
| Glitch-Immune Comparator Architecture | Prevents false resets from transient supply noise; validated with >150µs response latency and overdrive-dependent transient rejection |
| Manual Reset with Hardware Debounce | PBR pin integrates timing-based debounce using the same CRT capacitor - eliminates need for external RC or microcontroller polling |
| Support for Bipolar & Custom Rail Monitoring | V3/V4 support ADJ (positive adjustable) and –ADJ (negative adjustable) modes, enabling precise trip points for 12V, –5V, or sub-1V rails |
| Low-Power Supervision | 43µA typical ICC allows integration into always-on subsystems (e.g., RTC backup domains, wake-on-LAN controllers) without significant battery drain |
Applications
| Desktop & Notebook Computers | Telecom Equipment |
|---|---|
|
Use Scenario: Simultaneous monitoring of CPU core (1.2V), I/O (3.3V), memory (1.5V), and auxiliary (5V) rails during boot and thermal throttling. IC Role / Device Role / Timing Role: Quad-supply supervisor asserting system-wide reset if any rail falls below ±1.5% threshold; CRT-configured 200ms timeout ensures clean POST completion. Use Value: Prevents corrupted BIOS writes and unstable execution caused by marginal rail conditions - directly enabled by guaranteed 1V operation and tight threshold tolerance. |
Use Scenario: Monitoring redundant 3.3V, 5V, ±12V, and –48V bias supplies in line cards and optical modules under wide ambient temperature swings. IC Role / Device Role / Timing Role: High-accuracy comparator array detecting undervoltage on telecom-specific rails; –ADJ mode used for –48V sensing with VREF-referenced divider. Use Value: Eliminates need for discrete op-amp solutions or multiple single-rail supervisors - reduces BOM count and PCB area while maintaining ±1.5% trip-point stability from –40°C to +85°C. |
| Network Servers | Portable Battery-Powered Equipment |
|
Use Scenario: Coordinating power sequencing and fault response across 12V, 5V, 3.3V, and 1.8V rails in dual-CPU server motherboards with hot-swap capability. IC Role / Device Role / Timing Role: Centralized reset generator with programmable delay; PBR pin interfaces with service processor for controlled warm reset without AC cycle. Use Value: Enables deterministic reset coordination across complex power domains - critical for PCIe link training recovery and DRAM initialization consistency. |
Use Scenario: Supervising Li-ion battery-backed 3.3V MCU, 2.5V sensor, 1.8V RF transceiver, and 0.9V low-power domain in handheld medical devices. IC Role / Device Role / Timing Role: Ultra-low-current (43µA) quad monitor ensuring safe shutdown before battery cutoff; ADJ mode configures 0.9V rail with 100k/68.1k divider per datasheet Table 2. Use Value: Extends usable battery life by avoiding unnecessary resets while guaranteeing data integrity during final discharge - validated by 1V minimum VCC operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2902IMS#TRPBF | Includes supply tolerance monitoring, margining control, and watchdog timer - not present in LTC2900-1IMS#TRPBF; identical pinout and quad-monitor function | Required where dynamic supply margin testing or watchdog supervision is needed alongside reset generation | Select when system validation requires programmable voltage tolerance windows or periodic watchdog pulse injection |
| LTC2901IMS#TRPBF | Features adjustable watchdog timer in addition to reset timer; uses 16-lead narrow SSOP (not MSOP); otherwise matches LTC2900-1IMS#TRPBF functionality | Suitable for designs needing independent watchdog timeout (e.g., firmware hang detection) without adding second IC | Choose when watchdog capability is mandatory and board space permits larger 16-pin package |
Compared with LTC2900-1IMS#TRPBF, LTC2902IMS#TRPBF adds margining and tolerance functions at no pinout cost, while LTC2901IMS#TRPBF trades MSOP compactness for watchdog integration in a larger footprint - making LTC2900-1IMS#TRPBF optimal for cost- and space-constrained quad-monitor-only applications.
Availability
LTC2900-1IMS#TRPBF is available at Aetrix Electronics and suitable for desktop computers, telecom equipment, and portable battery-powered equipment requiring stable component supply, long-term industrial lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for LTC2900-1IMS#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (ADI) acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for the LTC portfolio, delivering high-performance analog, mixed-signal, and power management ICs for precision applications.
The LTC2900-1IMS#TRPBF belongs to Linear Technology's precision supervisory IC product line, designed specifically for multivoltage system power integrity - emphasizing threshold accuracy, low quiescent current, and flexible rail configuration in compact packages.
FAQ
What is the function of the CRT pin on the LTC2900-1IMS#TRPBF?
The CRT pin on the LTC2900-1IMS#TRPBF sets the reset timeout duration by connecting an external capacitor to ground. The timing is calibrated at 4.6ms per nanofarad (e.g., 47nF yields ~216ms). Leaving CRT unconnected results in a minimum delay of approximately 50µs. This capacitor also debounces the manual reset (PBR) signal, eliminating need for external RC networks.
Does the LTC2900-1IMS#TRPBF support monitoring negative voltage rails?
Yes, the LTC2900-1IMS#TRPBF supports negative rail monitoring via its –ADJ mode on the V4 input. In this mode, an external resistor divider between the negative supply and VREF (1.210V) shifts the trip point to ground-referenced levels - for example, configuring –4.64V detection using 464kΩ/121kΩ resistors per datasheet Table 3. VREF provides the necessary level-shifting reference.
What is the maximum supply voltage the LTC2900-1IMS#TRPBF can monitor?
The LTC2900-1IMS#TRPBF inputs (V1–V4, VPG, CRT, RST, PBR) are rated for absolute maximum voltages up to 7V. However, the device's internal operation depends on VCC - derived from the greater of V1 or V2 - which must remain within 1V to 7V. For monitoring >7V rails, external resistor dividers must scale the input to stay within the specified input voltage range.
How does the LTC2900-1IMS#TRPBF ensure reset validity during brownout?
The LTC2900-1IMS#TRPBF guarantees correct RST logic state for VCC ≥ 1V, meaning it asserts and holds reset even as supply rails collapse. Its comparators remain active and glitch-immune down to this threshold, and the internal bandgap reference stays functional until VCC drops below ~2V - ensuring no spurious release during brownout recovery.
Can the LTC2900-1IMS#TRPBF monitor fewer than four supplies?
Yes, the LTC2900-1IMS#TRPBF can monitor one, two, three, or four supplies. Unused inputs (e.g., V3, V4) should be tied above their respective threshold voltages - such as connecting V3 to V2 or using a resistor divider to set a valid ADJ trip point - to prevent false reset assertion. The device does not require all four inputs to be actively used.
LTC2900-1IMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 16 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 5ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC2900-1IMS#TRPBF FAQ
1.How can I place an order for LTC2900-1IMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2900-1IMS#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC2900-1IMS#TRPBF reliable?
The price and inventory of LTC2900-1IMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2900-1IMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2900-1IMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2900-1IMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2900-1IMS#TRPBF?
LTC2900-1IMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2900-1IMS#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC2900-1IMS#TRPBF?
For technical support, including LTC2900-1IMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2900-1IMS#TRPBF requirements.
6.How does Aetrix verify that LTC2900-1IMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2900-1IMS#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC2900-1IMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2900-1IMS#TRPBF?
All LTC2900-1IMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2900-1IMS#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC2900-1IMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC2900-1IMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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